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package event
{
    import flash.events.Event;
   
    public class CustomEvent extends Event
    {
        public var evObject:Object;
        public function CustomEvent(obj:Object, type:String)
        {
            super(type);
            evObject = obj;
        }
       
        override public function clone():Event
        {
            return new CustomEvent(evObject, type);
        }
    }
}
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1¡¢usersummary.mxml ------£¨×ӿؼþ£©
      DataGrid id=myDg £º doubleClickEnabled="true"  doubleClick="transfer(event)"
2¡¢ public function transfer(evt:MouseEvent):void
            {
                var cusEvent2 : CustomEvent = new CustomEvent(myDg.selectedItem,"itemUserData");
                dispatchEvent(cusEvent2);
            } 
3¡¢  accountmapping.mxml-------    £¨userCanvasÊÇÖ÷Ó¦ÓóÌÐò£©
             public var  UserSelectedData:object='';
           userCanvas.usersummary.addEventListener("itemU